libcxx/test/std/iterators/iterator.primitives/iterator.traits/volatile_pointer.pass.cpp

   1 //===----------------------------------------------------------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 // <iterator>
  10
  11 // template<class T>
  12 // struct iterator_traits<const T*>
  13
  14 #include <iterator>
  15 #include <cstddef>
  16 #include <type_traits>
  17
  18 #include "test_macros.h"
  19
  20 struct A {};
  21
  22 int main(int, char**)
  23 {
  24     typedef std::iterator_traits<volatile A*> It;
  25     static_assert((std::is_same<It::difference_type, std::ptrdiff_t>::value), "");
  26     static_assert((std::is_same<It::value_type, A>::value), "");
  27     static_assert((std::is_same<It::pointer, volatile A*>::value), "");
  28     static_assert((std::is_same<It::reference, volatile A&>::value), "");
  29     static_assert((std::is_same<It::iterator_category, std::random_access_iterator_tag>::value), "");
  30 #if TEST_STD_VER > 17
  31     ASSERT_SAME_TYPE(It::iterator_concept, std::contiguous_iterator_tag);
  32 #endif
  33     return 0;
  34 }